Rotary piston machine

ABSTRACT

A rotary piston machine which serves as the drive for fuel carburetor motors, or as a functional element for a motor, in a steam engine, as a compressor and pump. The machine is constructed in a hollow cylindrically-shaped housing and includes an axially hinged winged-shaped piston pivoted on a first axis and having at least two extending arms for sliding contact against the internal walls of the housing, a plurality of cylindrically-shaped rotary piston segments equal in number to the rotor arms and having perforated ends, and coupling joints slidably disposed on the extending wing-shaped piston arms. The sprockets are pivotably coupled within the perforated ends of the rim segments to the wing-shaped piston arms to close the segments around the hinged wing-shaped piston to form a second axis displaced parallel with respect to the first axis.

United States Patent 72] Inventor Franz-Joachim Runge Friesenstrasse 38,29 Oldenburg, Germany [2]] Appl. No. 808,144

[22] Filed Mar. 18, 1969 [45] Patented Mar. 30, 1971 [32] Priority Mar.19,1968

[33] Germany [54] ROTARY PISTON MACHINE 5 Claims, 29 Drawing Figs.

[52] U.S.Cl 418/138, 4l8/6,418/212 [51] Int.Cl ..F01c19/00, F01c 11/00[50] Field ofSearch 103/144; 230/157; 123/165 (A), 165 (C); 91/124;418/6, 138,212

[56] References Cited UNITED STATES PATENTS 999,371 8/1911 Keller230/157 1,004,696 10/1911 Schoeck l23/16(SA) Primary Examiner-Mark M.Newman Assistant Examiner-Wilbur J. Goodlin AttorneyAllison C. CollardABSTRACT: A rotary piston machine which serves as the drive for fuelcarburetor motors, or as a functional element for a motor, in a steamengine, as a compressor and pump. The machine is constructed in a hollowcylindrically-shaped housing and includes an axially hingedwinged-shaped piston pivoted on a first axis and having at least twoextending arms for sliding contact against the internal walls of thehousing, a plurality of cylindrically-shaped rotary piston segmentsequal in number to the rotor arms and having perforated ends, andcoupling joints slidably disposed on the extending wingshaped pistonarms. The sprockets are pivotably coupled within the perforated ends ofthe rim segments to the wingshaped piston arms to close the segmentsaround the hinged wing-shaped piston to form a second axis displacedparallel with respect to the first axis.

atented arch 30, 1971 5 9 10 Sheets-Sheet 2 INVENTOR.

FRANZ-JOACHIM RUNGE Patented March 30, 1971 10 Sheets-Sheet &

INVENTOR FRANZ-JOACH IM RUNGE Patented March 30, 1971 10 Sheets-Sheet 5Patented March 30, 1971 10 Sheets-Sheet 6 Patented March 30, 1971 10Sheets-Sheet 7 INVENTOR FRANZ-JOACHIM RUNGE Patented March 30, 19713,572,985

10 Sheets-Sheet 8 INVENTOR.

FRANZ-JOACHIM RUNGE BYWQQALD Patented March 30, 1971 10 Sheets-Sheet 10FIG. 76

FIG. 19

INVENTOR.

FRANZ-JOACHIM EUNGE aoranr rrsron Macnnss The present invention relatesin general to a piston machine and more specifically to a rotary pistondevice which may be used for many different purposes, such as, forexample, as a rotary piston motor or constructional element for gasolinecarburetors; in a steam engine; or as a compressor, for exampie, forcharging combustion devices; or as a pump.

The general advantages of the rotary piston device with respect toconventional stroke piston devices, and disc piston devices is wellknown. These conventional piston devices utilize different types ofpiston elements outside of the rotary piston device. These conventionaldevices are based on the eccentric movements of individualconstructional elements which are not suitable for achieving the highestpossible rotational speed. However, the technical differences betweenconventional piston devices and the rotary piston devices are not alwaysclear and not standardized. The disadvantages of the conventional pistonmachines are based on the fact that the rotor is either guidedeccentrically on its axis requiring a housing different from that of thecylindrical type machines such as troche drives, or the rotor isarranged with its axis eccentrically disposed with respect to the axisof the cylinder in the housing. in all of these instances, the rotoreither moves away and engages the wall of the housing, or the rotorcarries out a continual pivotal movement at the wall housing. In someinstance, both of these movements are created. The so called clattermarks which are being created on the housing walls of the known pistonslimit the number of revolutions and the per formance of these machines.Moreover, a further disadvantage of conventional piston devices is thatthe seal formed by the engaging point between the rotor and the wall ofthe housing is defective since it is formed by a line, created by thepivotal movement of the rotor, instead of by a continuously even face.Further disadvantages of conventional piston machines result from thefact that because of eccentric movement of the rotor, counterweightshave to be used for balancing the mass forces. However thesecounterweights are detrimental to the bearing load and to the overallfunction of the device. in other instances, the centrifugal forces whichare created during the rotational movement of the rotor for sealing themoving integrated rotor parts at the wall housing are detrimental andoften having a destroying effect beyond certain limitations.Furthermore, in all cases, it is technically not possible to change theratio between the intake volume and the compression volume.

The problems associated with gas transfer control devices in knownrotary piston apparatus makes them completely unsatisfactory inmechanical operation and function. This is particularly true withrespect to internal combustion engines.

The operation of gas overflow or gas transfer from the compressionchamber to the combustion chamber (expansion chamber) is usually handledin such a manner that the inlet port and the outlet port of the overflowchannel are permanently open, similar to the carburetor and the exhaustin an engine (see German Pat. No. 248,070, and U.S. Pat. No. 3,181,510).However, this operation is disadvantageous because no substantialprecompression force is available. There are more disadvantages inherentin the known engines where the piston is not sealed with respect to itshousing, although by design, such a configuration increases the dangerof a carburetor fire. in other known engines, the operation of the gasoverflow from the compression chamber to the combustion chamber(expansion chamber) is carried out in the following manner. A controldisc acts as a seal at the overflow channel. However, .0 seal, thecontrol disc with respect to the other engine parts creates differentproblems and requires additional mechanical parts which render thedevice expensive. Furthermore, an engine of that type is subject tofrequent breakdowns.

Finally, it should be noted that the technical complexity ofconventional devices render them impractical and expensive, because ofthe differences between the constructional elements for disc andrectangular profile, and particularly due to the fact that the rotorrequires special mechanical control and constant maintenance. Devicessimilar to the ones described above failed to operate properly becauseit was found to be impossible to develop a multisectional rotor,essential for the proper functioning of the device. A multisectionalrotor should provide constant contact faces unto the housing wallswithout transmitting centrifugal forces during axial movement of therotor.

It is therefore an object according to the present invention to providean improved rotary piston device which overcomes the above-mentioneddisadvantages of conventional piston devices.

it is a further object according to the present invention to provide animproved rotary piston device which includes a rotor which is displacedby the simple movement of two elements around their own axis.

it is still a further object according to the present invention toprovide an improved rotary piston device which is simple in design, easyto construct, and inexpensive in cost.

Other objects and features of the present invention will become apparentfrom the following detailed description considered in connection withthe accompanying drawings which disclose several embodiments of theinvention. It is to be understood however that the drawings are designedfor the purpose of illustration only and not as a definition of thelimits of the invention as to which reference should be made to theappended claims.

In the claims wherein similar reference characters denote similarelements throughout the several views:

FIGS. Ila-1f, FIGS. 20 and 2b, FIGS. 30 and 3b, and FIGS. 4a and 4b arevarious perspective views of two part, to seven part rotors havingdifferent dimensional rations;

FIGS. 5 and 6 are side views of two part, to seven part rotors inaccordance with subject invention;

FIGS. 7-ll are perspective views of the inventive device showing thehousing partly in cross section;

FIG. 12 illustrates the operation of the invention in the embodiment ofa rotary piston in a gasoline carburetor, having a two part rotor shownin cross section;

FIG. 13 is an axial section of the invention in the embodiment of arotary piston in a gasoline carburetor, having a three part rotor;

FIG. 14 is a cross-sectional view of the invention in the cmbodiment ofa rotary piston in a gasoline carburetor, having a four part rotor,utilizing the outer chamber as the intake chamber, and the internalchamber as a combustion chamber;

FIG. 15 is a schematic view, showing the invention as a constructionalelement of a rotary piston in a gas carburetor with two elementsarranged side by side;

FIG. 16 is a further embodiment of FIG. 15;

FIGS. lfiA-lB further depict MG. 16 more clearly where 16A shows a motorwith two housings, in which the left housing is the compression chamber,and the right housing is the combustion chamber. FIG. 168 shows theviews A and B of FIG. loA;

NO. 17 is another embodiment whereby the elements are connected inseries with respect to each other;

FlG. 18 is still another embodiment of the invention in a steam enginehaving a two part rotor; and

FIG. 19 is a further embodiment of the invention in a steam enginehaving a three part rotor.

Referring to FIGS. la-lf, FIGS. 2a and 2b, FIGS. 3a and 3b, and F IGS. 4and db, there is shown a rotor 3 which is disposed inside of a hollowcylindrical housing l. Rotor 3 includes an axis 2 corresponding to theaxis of housing l and is a rotary disclike cylindrical member heldtogether in the center by a pivotable hinge. The rotor includes at leasttwo extension arms having rectangularly shaped profiles. The rotor alsoincludes cylindrical rim segments 5 which are guided around thecylindrical axis of rotor 3. Rim segments 5 include an axis 4 which isdisplaced parallel with respect to rotor axis 2;. The casing of rimsegments 5 encompass the center of rotor 35 and are perforated at theirends to receive the rotor extensions and the guides thereof. It shouldbe noted that the aforementioned elements form a rotatably movable unit.This unit seals the chambers formed inside and outside of the rimsegments which are formed by the axial displacement. During the rotarymovement of the rotor, the volume of these chambers is axially increasedand decreased in sections. Intermittent connections can be made betweenthe chambers because of the groovelike indentations 26 of the rimsegments 5.

Rotor 3 and its extension arms extend principally to the internal faceor walls of housing 1. Due to the central axial location of rotor 3, therotor extension arms slide during each phase of the rotary movement,constantly along the internal contact face or walls of the housing.Rotor 3 is guided constantly and pivotably within rim segments 5 bymeans of segmentlike profiled joints 6, which are retained withinperforated ends of the rim segments for sliding contact both sides ofthe rotor extension arms so as to guarantee a constant contact face withthe internal face of the housing during each phase of the rotarymovement of the rotor. In order to connect the segments of rim 5 to axis4, the casing is provided with a cylindrical bottom part 115 (FIG. 9)which is inserted on the inside of one of the assembled housing parts ofhousing 1, for rotary movement. Cylindrical bottom part of rim segments5 form a part of the side face inside of one end of the housing so thatit forms an even face with the housing so that axis 43 extendsrearwardly out of the end of housing 1. Likewise, axis 2 of rotor 3 isguided through the other end of the housing so that the housingpivotably supports rotor 3.

The height of rim segments 5, the lengths of joints 6, and the height ofrotor 3 at its center and on each end of its extensions correspond tothe height of the internal cylinder formed by the inside of housing 1.The power transmission may be coupled out of the apparatus on axis 4 ifaxis 2 of rotor 3 is secured or affixed to housing 1. Likewise, thepower transmission may also be coupled out of rotor axis 2 if rimsegment axis 4 is secured or affixed to housing 1. The radially arrangedperforations on the ends of rim segments 5 which serve to receive therotor arms and joints ti are displaced by the degree of the angle whichresults from axis 4 and Slob/N, where N is the number of the rotatingarms of the rotor.

When the invention is used in the embodiment of a rotary piston motorfor gasoline carburetors, the distance between the center of the axis ofrotor 3 and the center of the axis of rim 5 constitutes the differencebetween the outer radius of the rim casing and the inner radius ofhousing 1. The radius of the center of the rotor compares substantiallyto the difference between the outer radius of the rim casing and thewidth of the rim casing. Furthermore, rim 5 comprises bevels 25 on theface opposite to the bottom face at defined places at the inner andouter casing face. Also, the rim may comprise at the face, adjacent tothe bottom thereof, a groovelike indentation 26 outside of the bevel 25at the outer casing face, so that in a defined axial position, thebeveled face of the outer casing face and the beveled face of the innercasing face and the perforations which are arranged at the bottomcorrespond in a turntable fashion with two perforations in each sidewallof the housing parts connected by an overflow chamber (see FlG. ill).The overflow chamber is provided in the outer face of the housing wallin form of a groove and is closed with a cover plate 27. The number ofbeveled faces in the casing, or the perforations on the bottom of rim 5are defined by the number of the rotor parts which are displaced in themeasurements of their uniformity in a degree which results at axis 4 ofrim 5 from 36fl/the number of the rotor parts.

The chamber, which is located outside of rim 5, is sufficient for theoperation of the device, for the embodiment of the invention whichserves as, a constructional element of a rotary piston motor forgasoline carburetors, a steam engine, a compressor, and a pump.Therefore such a constructional element does not include a beveled faceat the inner face of the casing of rim 5 or employ perforations at thebottom thereof or perforations at the sidewall of housing 1, even thoughthe basic construction remains the same. In this embodiment, theoverflow chamber is connected to the chamber outside of rim 5 of theconstruction element which in turn is connected with furtherconstructional elements in a nonpositive side-by-side arrangement, or inseries with respect to each other. In this embodiment, the innerchambers may be used instead of the outer chambers if required. In thesteam engine, the compressor, and in the pump arrangements, beveledfaces or perforations in rim 5, or in the sidewalls of housing 1 are notnecessary, since an overflow chamber is not needed.

It should also be noted that no particular measurement ratios are neededfor the radius of the rotor center or the width of rim 5 for theconstructional element of a rotary piston motor for gasolinecarburetors, in the steam engine, in the compressor and in the pumparrangements.

Depending on the purpose of use and the arrangement of the device, theinlet and outlet perforations of housing 1 can be arranged differently.Also, in certain embodiments, it may be necessary to include groovelikeindentations 26 on the casing face of rim 5 between the extensions.These grooves correspond to depressions which are commonly found inconventional rotary and disc type piston motors. Outfitting the devicewith conventional sealing elements, such as piston rings, etc., andsliding or roller bearings is commonly known. On the other hand, theseconventional sealing means do not create any problems, because of thesimplicity of the invention whereby each type of contact line isreplaced by constant contact faces, so that conventional sealing partsof the aforementioned parts may be readily used for the subjectinvention. Since these sealing means are commonly known and do notconstitute a part of the subject invention, they have not been shown inthe drawings. Likewise, the water jacket encompassing the piston housingfor cooling the device was also omitted, as well as the drive elements,the spark plugs, and'thc carburetor, so as to provide a betterunderstanding of the invention.

FIG. 7 shows a schematic view of the entire invention with housing I incross section. FIGS. 8-11 show an exploded view of the individual partsof one rotary piston motor for gasoline carburetors with a two partrotor 3, so that power transmission is carried out via rim axis 4. Axis2 of rotor 3 is mounted fixedly in housing 1. In this particularembodiment, the inner chamber is the intake chamber while the outerchamber serves as the combustion chamber. These views also show that thebeveled faces at rim 5 serve to control the overflow chamber located inthe housing part which carries rotor axis (see FIG. 11) 2. The twocircularlike arrows in FIG. 7 indicate the rotary movement of rotor 33.The reference characters of the various elements correspond to the onespreviously mentioned in the specification.

FIG. 12 shows another embodiment of the invention in a rotary pistonmotor for gasoline carburetors having a two part rotor shown in axialsection by using the inner chamber as an intake chamber, and the outerone as the combustion chamber. The arrow at the axis of the rotorindicates the direction of movement of the rotor. The arrows which areonly interrupted by the two extensions of the rotor indicate thedirection of the gas movement from the intake chamber to the outletchamber. The working phases of intake and compression within theconfines of the chamber inside of the rim can be seen, as well as theoverflow of the gas from this chamber to the chamber outside of the rimin which the combustion" as well as the exhaust phases take place. Theinlet consists of a perforation in the sidewall of one of the twohousing parts. There are two ignition firings per axial movement. Thedrawing shows the axial position shortly before ignition since theoverflow channel is still opened on the beveled face of the rim.

P56. 13 shows still a further embodiment of the invention in a rotarypiston motor for gasoline operation having a three part rotor, shown inaxial section, by using the inner chamber as intake chamber and theouter one as a combustion chamber. In contrast to the operation .of allthe aforementioned embodiments, this particular embodiment comprises afurther operational step, namely a post compression stage which followsshortly after the initial compression stage. The post compression stageis achieved by changing the overflow chamber. The rim is thus providedwith a groove on its outer face, between the rotor extensions, which issimilar to the depressions found in rotary and disc type pistons. Foreach axial movement of the rotor, 3 ignitlons take place. An axialposition of approximately a 60 angle is shown in the drawing prior toignition.

FlG. M shows the subject of the invention utilized as a rotary pistonmotor in a fuel carburetor having a four part rotor (axial section)wherein the outer chamber is employed as the intake chamber, and theinner one as a combustion chamber. The operation of this devicecorresponds to the operation of the above-described devices.

FIG. 15 shows schematically the subject invention and the operationthereof as a functional or constructional element of a rotary pistonmotor for fuel carburetors. This embodiment shows the side-by-sidearrangement of two constructional elements to form a rotary pistonmotor. Each constructional element comprises a two part rotor. The rimsof these rotors are connected with each other by one axis. Since theinner chamber is not needed for the operation of the device in thisembodiment, the radius of the center of the center of the rotor, and thewidth of the casing of the rim need not be in a special relationship toeach other. The dimensions of these constructional elements with respectto each other is optional and have been shown to have the samedimensions with respect to each other for the purposes of illustrationonly. The intake may be provided in this embodiment in the form of aperforation in the casing of the housing. The drawing shows the workingphases of intal e" and compression outside of the rim chamber of theright constructional element. The overflow is shown from the rightchamber to the left one. In reality, the overflow" takes place throughthe axially arranged constructional elements which are arranged inseries with respect to each other, so that the"combustion and theexhaust stages take place in the left chamber outside of the rim. Theaxial position is shown prior to ignition. All the reference charactorsin the drawing are the same as in the aforementioned embodirnent.

FIG. in shows schematically the subject of the invention in the form ofa constructional element of a rotary piston motor for fuel carburetors.The embodiment as shown is a constructional element comprised of twoelements in a side-by-side arrangement forming a rotary piston motor.Each of the two constructional elements has a three part rotor. In thisparticular embodiment, the two rim axes are connected with each other.However, it should be noted that only the inner chamber of eachconstructional element is used for the operation of the device.

FIGS. loA and 168 show the side-by-side arrangement discussed in FIG.16. As rotor rim 5 rotatably turns, the overflow channel h permitscoacting between the right housing (combustion chamber) and the lefthousing (compression chamber). Each rotor is internally secured aboutshaft 2, while power is tapped off of external shaft 4.

The hei' ht ratios of both constructional elements as well as theindividual constructional parts are optional and are purposely shown indifferent dimensions in this drawing. Their mode of operationcorresponds to the aforementioned devices. The spark plug seats, theinlet, and the outlet are arranged on the sidewall of the housing.

FlG. 2 .7 shows schematically a further embodiment of the invention as aconstructional element for a rotary piston motor for fuel carburetorswhereby the elements are arranged in series with respect to each otherforming a rotary piston motor. Each of the two constructional elementscomprise a three part rotor. Since the axes are radially disposedbecause of the arrangement, a nonpositive coupling of two even axes isneeded for controlling the motor. This coupling is schematically shown,so that the two rim axes are shown in the form of two connected coggedwheels, whereby the arrows indicate the counterclockwise movement of theaxes involved. Moreover, the dimensions of the radius of the rotorcenter, and the width of the casing may be optionally established, andare shown to correspond, because the chambers within the rim are notneeded for the operation of the device. in order to demonstrate themultitude of applications of the subject invention, the dimensions ofthe two constructional parts as well as the individual parts withrespect to each other are shown having different dimensions.

The construction shown on the left side of FIG. l7, connected to theright side of the constructional element, the larger of the twoelements, provides for the intake" and the combustion" stages of thedevice. Because the dimensions of the connected constructional elementare optional, and in view of the theoretically unlimited intake volume,the device may serve as a compressor for charging the connectedconstructional element in which, after the overflow of the gas as shownin the drawing, the "post compression, the combastion, and the exhauststages are carried out in the overflow chamber. The operational functionof the device from inlet to outlet is indicated by the arrows, showingthe actual flow of the gas. As already discussed with respect to FIG.13, groovelike indentations are provided to take care of the additionalworking phase of post compression. The grooves are provided at the outercasing of the rim between the extensions of the rotor.

FIG. 18 is a schematic view of a further embodiment of the invention inthe form of a steam engine, a compressor, or a pump, with a two partrotor, using the outer chamber as a working chamber. No beveled facesare needed on the rim and the overflow channel. The outer chamber servesas the working chamber and the embodiment functions similarly withrespect to the previously discussed embodiment.

FIG. 19 is a schematic view of another embodiment of the invention for asteam engine, a compressor, or a pump, with a three part rotor using theinner chamber as the working chamber. Again the simplicity of the deviceneed not be discussed in detail.

In conclusion, the improvements of the subject invention reside in thefact that the central arrangement of the rotor in the housing permits anoptimal and friction free device due to the constant contact faces whichmaintain a complete seal.

The subject invention therefore provides a device which is simple,inexpensive and requires very little maintenance of its parts, becauseof its free pivotal and easy operation which results in betterperformance, permitting the use of circular and rectangularconstructional profiles.

While only a few embodiments of the present invention have been shownand described, it will be understood that many changes and modificationsmay be made thereunto without departing from the spirit and scope of theinvention.

lclaim:

1. An internal combustion rotary piston apparatus comprismg;

a hollow cylindrical housing;

at least two rotary pistons, rotatably and eccentrically positionedwithin said housing so as to form compression and combustion chambers assaid rotary pistons revolve with respect to said housing;

a plurality of wing-shaped pistons forming a chassis on which each ofsaid rotary pistons is secured;

a shaft disposed concentrically with respect to said housing having oneend fastened to said rotary pistons; and

an overflow channel having an inlet. and an outlet port positioned alongthe inside surface of said housing so that said channel connects thecompression and combustion chambers in a manner so as to cooperate withsaid wing-shaped pistons so that the said inlet and outlet ports of saidoverflow channel are opened at the time when each of said compressionand combustion chambers reach a certain volume.

2.. An internal combustion rotary piston apparatus as recited in claim1, wherein each of said rotary pistons comprise at least one notch ontheir outer surface and arranged in such a manner as to cooperated withsaid wing-shaped piston so that said inlet and outlet ports of saidoverflow channel are opened at a time when the compression andcombustion chambers reach a certain volume.

3. An internal combustion rotary piston apparatus as recited in claim 1comprising;

a compression chamber internally and radially disposed inside each ofsaid rotary pistons; a combustion chamber arranged outside and radiallywith respect to each of said rotary pistons; and a plurality of beveisdisposed on the outside periphery of each of said pistons in order toopen said inlet port in a rotary manner shortly before one of saidwing-shaped pistons reaches said port at the radial internal edge ofsaid rotary piston.

4. An internal combustion rotary piston apparatus as recited in claim 1additionally comprising;

a left and right housing, wherein said left housing is a compressionchamber, and said right housing is a combustion chamber; and

a port connecting both housings in a manner so as to provide cooperationbetween the gas in said compression chamber and said combustion chamber.

5. An internal combustion rotary piston apparatus as recited in claim 1comprising a plurality of groovelike indentations disposed at the outerradial edges of each of said pistons, so that said overflow channel actsas a connection between said combustion chamber and said compressionchamber.

1. An internal combustion rotary piston apparatus comprising; a hollowcylindrical housing; at least two rotary pistons, rotatably andeccentrically positioned within said housing so as to form compressionand combustion chambers as said rotary pistons revolve with respect tosaid housing; a plurality of wing-shaped pistons forming a chassis onwhich each of said rotary pistons is secured; a shaft disposedconcentrically with respect to said housing having one end fastened tosaid rotary pistons; and an overflow channel having an inlet and anoutlet port positioned along the inside surface of said housing so thatsaid channel connects the compression and combustion chambers in amanner so as to cooperate with said wing-shaped pistons so that the saidinlet and outlet ports of said overflow channel are opened at the timewhen each of said compression and combustion chambers reach a certainvolume.
 2. An internal combustion rotary piston apparatus as recited inclaim 1, wherein each of said rotary pistons comprise at least one notchon their outer surface and arranged in such a manner as to cooperatedwith said wing-shaped piston so that said inlet and outlet ports of saidoverflow channel are opened at a time when the compression andcombustion chambers reach a certain volume.
 3. An internal combustionrotary piston apparatus as recited in claim 1 comprising; a compressionchamber internally and radially disposed inside each of said rotarypistons; a combustion chamber arranged outside and radially with respectto each of said rotary pistons; and a plurality of bevels disposed onthe outside periphery of each of said pistons in order to open saidinlet port in a rotary manner shortly before one of said wing-shapedpistons reaches said port at the radial internal edge of said rotarypiston.
 4. An internal combustion rotary piston apparatus as recited inclaim 1 additionally comprising; a left and right housing, wherein saidleft housing is a compression chamber, and said right housing is acombustion chAmber; and a port connecting both housings in a manner soas to provide cooperation between the gas in said compression chamberand said combustion chamber.
 5. An internal combustion rotary pistonapparatus as recited in claim 1 comprising a plurality of groovelikeindentations disposed at the outer radial edges of each of said pistons,so that said overflow channel acts as a connection between saidcombustion chamber and said compression chamber.